Filter



Nov. 30, 1937.

F. GLASS El' Al.'

FILTER 1 Filed sept. 5, 1935 igina QMMLS' IAE'G' Zaanse.A 61511522 Patented Nov. 30, 1937 UNITEDv STATES FILTER Willie F. Glass and Milt on G. Sibley,l Gulfport,

Application September 5, 1935, Serial No. 39,330 Renewed February-25, 1937 f 1 Claim.

bag, in which novel means is employed for preventing the sagging or collapsing of the lter powder on the bag materialwhen the filter is drained or is not in use.

Another object of the invention is to provide an improved lter ,structure having a novel means for maintaining the filtering bag in operative position therein and for facilitating the draining of the bag.

The invention will be best understood from a consideration of the following detailed description taken in connection with the` accompanying drawing forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claim.

In the drawingz- Figure 1 is a view in vertical section through the filter structure embodying the present invention.

Figure 2'shows a portion of the two ply cloth from which the filter ybag is formed.

Referring now more particularly to the drawing wherein like numerals of reference designate corresponding parts throughout the several views, the numeral I indicates the housing or outer portion of the filter structure which preferably has an open top 2 and may be supported upon legs 3 so as to give clearance for the depressed or sump like bottom 4, which is provided with a valved outlet 5, which provides a drain means for connection with a suitable drain pipe 6.

Adjacent the top of the housing, an outlet pipe 'l is connected and extending through the housing wall at approximately the same elevation as the outlet pipe, is an inlet pipe 8 which extends to the center of the housing and to a downwardly directed pipe section or nipple 9.

Disposed centrally within the housing is a frame structure I0 which may be constructed of any suitable material and which, in the form here illustrated, comprises a top annulus II and the intermediate and lower annuli\or rings I2 and I3 secured to spaced vertical members I4. These members I4 extend below the lower ring or anv(Cl. 210-183) nulus I3 to form supporting 'legs which rest upon the bottom 4 of the housing. 'Ihe interior of the basket is lined from the top to the bottom with a screen wire of small mesh, which is indicated by,r

the numeral I5, while the bottom .of the basket is closed by a sheet or body of solidmaterial, which is indicated by the numeral I6. Disposed within the basket against the inner s ide of the,

screen wire I5 is a fabric bag I1 of a novel Idee` sign for retaining a layer of filter powder over1 the interior sides and bottom of` the basket. portion of this bag I'l is illustrated in Figure 2 and as shown comprises t'wo plies of material.;

'I'he outer ply is in the form of arelatively'closely woven fabric I8, such as lightweight canvas,

while the inner ply, which is indicated by the nu- This bag when placed within the basket has; the closely woven fabric I8,A against the wire l5 so that the rough fabric forms the inner wall ofv the bag and provides a means of trapping and retaining particles of filter powder material which may be brought into contacttherewith with the liquid which .passes through the bag'.

The top edges of the bag is turned outwardly` over the top annulus II which is relaitvely wide" and may be provided with upwardly extending screws 20 for the reception of ywing nuts or thumb screws 2 I. After turning out the 'top edge of the bag there is then placed over the top of the Ibasket the cover plateI 22 which has suitable apertures to receive the screws-2ll andfwhich; is held down in place by the nuts j cover -plate 22 has a central threaded peningfin which the nipple 9 is engaged and inadditiona petcock controlled pipe 23 by meansfof which air may be let into the bag when it is desired to drain the same. y

In the use of the present filter, when a new bag is put into the screen basket the housing is filled with clean liquid by means of the pipe 8. A: solutionfof lt'er powder is then pumped into the p ,bagfthroughthe pipe and the pressure 'carries therpowderovr thesurface I9 of the same where it will''fclin'g to the roughenedmaterial thereof'.KL

The structurelle then ready for'use and any dirty solvent pumped through the pipe .8 into the filter basket will ficedthrough the bag and-basket,

reachingl t e outside-of.; the basket in clean condition and'leaving'the dirt inthe basket :where it will settle to the bottom of the same.l By providing the central inlet for the dirt carrying solvent at the top of the filter basket, the liquid will enter without creating a great amount of disturbance and therefore the dirt of the solvent liquid will gradually settle while the liquid will pass ofi' through the powder lled wall of the bag and flow out through the pipe 1.

The filter powder referred to is any suitable commercial'filter powder which may be obtained on the market for use in filter bags.

While such powders have previously been used in fabric bags, the bags are always smooth on the inner surface so that it is necessary to provide a means for agitating the liquidl therein so that the powder will be kept distributed over the surface of the bag. When rthe filter is not in use or when the liquid is drawn from the housing for any purpose the wall of filter powder adhering to the fabric bag will sag and slide to the bottom of the bag. In the present` invention, by the use of the rough surface on theinside of the bag, the powder will be packed intothe roughened surface and will not leave the same when the liquid is still or when it is drawn o.

While the receptacle I has been shown ashaving an open top, it will, of course, be understood 'upon said bottom and positioned against the inner sides of said standards and terminating at said top band, a removable cover plate overlying said top band and the flange thereof, means for coupling said cover plate with said flange, means for introducing fluid into the strainer structure through said cover plate, and a cloth strainer `bag within the strainer structure and having its top edge clamped between said cover plate and said flange, said bag being made up of an outer hard Woven cloth and an inner rough soft wovenv cloth of the character of-turkish toweling against the inner surface of which4 thesaidltering powder clings to form a filtering body.

WILLIE F. GLASS. MILTON G. SIBLEY. 

